What common mistake do developers make with N+1 pattern, why does the mistake cause problems, and what is the safer approach?

What common mistake do developers make with N+1 pattern, why does the mistake cause problems, and what is the safer approach? One recurring problem with N+1 pattern is applying it without understanding the boundary it protects. Adding eager loading everywhere without considering payload size; loading ten large relationships can be as problematic as under-loading. In addition, A collection query followed by one additional query for every model's relation can grow into many database round trips. Safer engineering approach: keep the responsibility in the correct layer, use the framework's supported API, validate and authorize inputs, avoid hidden side effects, and verify the behavior with tests.